有两个类:class A
和class B
。在class A
中,我想在class B
中调用一个方法。同时,在class B
中,我想在class A
中调用一个方法。
像:
class A(object):
"""docstring for A"""
def __init__(self):
self.str_A = 'this is class A'
def printA(self):
print self.str_A
def callB(self):
B.printB()
class B(object):
"""docstring for B"""
def __init__(self):
self.str_B = 'This is class B'
def printB(self):
print self.str_B
def callA(self):
A.printA()
好吧,我修改了我的表情。
class A(object):
"""docstring for A"""
def __init__(self):
self.str_A = 'this is class A'
def printA(self):
print self.str_A
There is a function to call printB in class B names CB.
class B(object):
"""docstring for B"""
def __init__(self):
self.str_B = 'This is class B'
def printB(self):
print self.str_B
There is a function to call printA in class A names CA.
aaa = A()
bbb = B()
aaa.CB() or bbb.CA()
这是我的两个班级:
class Stock
是一个接收股票数据的类,RtnTick
中的class Stock
可以自动更新。class TradeSystem
是一个用于制作GUI的类,当点击按钮时,程序可以库存交换.GUI必须实时显示数据,因此当RtnTick
更新数据时,我想在self.e1_str.set()
中调用class TradeSystem
进行显示。当我点击按钮时,我会在TradeCommit
中拨打class Stock
进行交易。我省略了很多其他代码。这两个类很大。而且......你呢?有想法解决这个问题吗?我是python中的新人。谢谢。
class Stock(LtsAPI):
def RtnTick(self,t):
global Sto,Configs_Path,Sto,AskPri,BidPri,AskVol,BidVol
contract = t.InstrumentID
if(contract in Sto):
#Here I want to call **self.e1_str.set()** in class TradeSystem.
def TradeCommit(self):
#This is a function to trading.
class TradeSystem(object):
def __init__(self):
self.root = Tk()
self.e1_str = StringVar()
self.e1 = Entry(self.root,textvariable = self.e1_str)
self.e1.bind('<KeyPress>')
self.e1.grid(row = 1, column = 0)
#**self.e1_str.set()** can set the content to display.
def Trade(self):
self.button = Button(self.root,command = *call **TradeCommit** in class Stock*)
#command is the function to run when triggered.
答案 0 :(得分:4)
您正在寻找类metods(其他语言的静态方法)
class A(object):
"""docstring for A"""
def __init__(self):
self.str_A = 'this is class A'
def printA(self):
print self.str_A
@classmethod
def CB(cls):
B().printB()
class B(object):
"""docstring for B"""
def __init__(self):
self.str_B = 'This is class B'
def printB(self):
print self.str_B
@classmethod
def CA(cls):
A().printA()
aaa = A()
bbb = B()
aaa.CB() or bbb.CA()
>>> This is class B
>>> this is class A
但是由于printA()和printB()需要一个实例,你需要实例化一个对象来调用它们
答案 1 :(得分:1)
就在上周,我正在开发类似的东西,我需要在B类中实例化A类,在A类中实例化B类(循环依赖性问题)。这可以用于任何目的,在两个类对象之间共享数据,调用其他类对象的方法等。这是我最终如何做到这一点,你可以根据你的需要编辑它,如果这是你需要的。
class A(object):
def __init__(self, b=None):
self.B = b or B(self)
self._number = None
def set_number(self, number):
self._number = number
def get_number(self):
return self._number
def a(self):
print 'Method "a" of "A"'
def b(self):
print 'Method "b" of "A"'
def c(self):
print 'Method "c" of "A"'
class B(object):
def __init__(self, a=None):
self.A = a or A(self)
self._number = None
def set_number(self, number):
self._number = number
def get_number(self):
return self._number
def a(self):
print 'Method "a" of "A"'
def b(self):
print 'Method "b" of "A"'
def c(self):
print 'Method "c" of "A"'
if __name__ == '__main__':
a = A()
b = B()
a.set_number(1)
print a.get_number()
a.a()
a.b()
a.c()
a.B.set_number(2)
print a.B.get_number()
a.B.a()
a.B.b()
a.B.c()
b.set_number(3)
print b.get_number()
b.a()
b.b()
b.c()
b.A.set_number(4)
print b.A.get_number()
b.A.a()
b.A.b()
b.A.c()
答案 2 :(得分:0)
我找到了解决这个问题的方法。
class A(object):
"""docstring for A"""
def __init__(self):
pass
def FromAnother(self,s):
self.Object = s
def ExecAFunction(self,t):
self.Object.AFunctionFromA(t)
class B(object):
"""docstring for B"""
def __init__(self):
self.object = A()
self.object.FromAnother(self)
self.object.ExecAFunction('Call a function in B through A.')
def AFunctionFromA(self,t):
print t
b = B()
我在B类中实例化了一个类。 init 。我使用我刚刚定义的实例将B本身传递给A函数。接下来我称之为B&#39的函数在A.So中,AFunctionFromA到函数ExecAFunction现在我可以调用两个类之间的函数。您如何看待这种方法?